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Juan Carlos Diaz-Perez, W. Keith Jenkins, Dharmalingam Pitchay and Gunawati Gunawan

) or feather meal (12.8% N) fertilizer. Values represent means across substrates (Organic Pro-Mix and Organic Miracle-Gro). Solid line in panel A was fit with nonlinear regression using a sigmoidal fit. Solid line in panel B was calculated using

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Handell Larco, Bernadine C. Strik, David R. Bryla and Dan M. Sullivan

approved by the Organic Materials Review Institute, including fish emulsion or feather meal as sources of N. Fish emulsion is applied as a direct liquid application to the soil of the in-row area or is injected through the drip irrigation system. Feather

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James W. Julian, Bernadine C. Strik, Handell O. Larco, David R. Bryla and Dan M. Sullivan

injected through the drip irrigation system and granular feather meal as N fertilizer sources. Supplying N from feather meal or fish fertilizers has an estimated product cost to growers of $10 to $25/kg N applied. Application of surface mulch has been shown

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Handell Larco, Bernadine C. Strik, David R. Bryla and Dan M. Sullivan

Review Institute-approved fish emulsion or feather meal in organic systems. Most species of blueberry are adapted to low soil pH conditions in the range of 4.5 to 5.5 and require NH 4 -N over NO 3 -N for uptake. Nitrogen uptake increases throughout the

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Bernadine C. Strik, Amanda Vance, David R. Bryla and Dan M. Sullivan

importance for the economical production of organic blueberry ( Strik, 2014 ). Fish solubles and feather meal are common fertilizers used by organic blueberry growers. Fish solubles are typically applied by fertigation through the drip irrigation system

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Bernadine C. Strik, Amanda Vance, David R. Bryla and Dan M. Sullivan

equivalent N mineralization rates (58% to 64% of total N converted to mineral N within 28 d) for a variety of fish and feather meal fertilizers commonly used by organic growers. We found that cumulative yield was 3% higher when fertilizing with lower rates of

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Mark Gaskell and Richard Smith

), fava beans ( Vicia faba ), and barley ( Hordeum vulgare )] before application of varying rates of N as granular feather meal ( Gaskell, 2004 ). This study found that pepper yields increased with increasing rates of N as feather meal and that yields at

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S. Castro Bustamante and T.K. Hartz

sidedressed on 3 May with a feather meal-based fertilizer (12N–1.3P–0K) at a rate of 30 kg·ha −1 N. Field 12 was sidedressed 15 May with feather meal (12N–0P–0K) at 34 kg·ha −1 N. The RR trial was sidedressed on 20 May using a feather meal-based fertilizer

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Joji Muramoto, Richard F. Smith, Carol Shennan, Karen M. Klonsky, James Leap, Miriam Silva Ruiz and Stephen R. Gliessman

report on a study to evaluate the contribution of N from a mixed legume/cereal cover crop and organic fertilizer (feather meal + blood meal) to an organic broccoli crop and to evaluate the economic benefits of cover crop use. Materials and Methods